To track your Aadhaar postal status, please enter your enrolment number and date time in the respective fields. These details can be found on the acknowledgement slip which you got from the enrolment centre after enrolling for the Aadhaar number. Since this is the place for tracking your Aadhaar postal status from the Indian Postal Service, you can track only if the Indian Postal Service has received your Aadhaar letter from the UIDAI to deliver to your mailing address. In any other case it will show that they have no consignment with such details and for that you can track your UIDAI Aadhaar status.